Communicating device



NW; 17, 1931. R G, STILLMAN 1,831,891

COMMUNICATING DEVICE Filed Feb. 8, 1929 4 Sheets-Sheet 1 Nov. 17, 1931. R, G STILLMAN 1,831,891

COMMUNICATING DEVICE Filed Feb. 8. 1929 4 Sheets-Sheet 2 82 sum:-

Nov- ,1931, v R. e. STILLMAN ,3

COMMUNICATING DEVICE Filed Feb. 8, 1929 4 Sheets-Sheet 4 1%. I5 9 90 9/ .92 aa ea aa Patented Nov. 17, 1931 UNITED STATES RAY G. STILLMAN, OF MINNEAPOLIS, MINNESOTA COMMUNICATING DEVICE Application filed February 8,1929. I Serial No. 338,440.

This invention relates to devices afiording communication between central locations and one or more outlying locations, and it is particularlyadapted for usein connection with 5 railway systems.

It is an object of this invention to provide a novel device afl'ording communication between a central point and one or more outlying unattended points, which incorporates w merely a single electrical transmission line between the central point and all of the outlying points, and will permit an operator at the central point to know what is going on at any of the outlying points, and will also permit the operator to operate a signal or signals at any desired outlying point.

It is a more specific object of the invention to provide a communicating device for use in a railway system between a train dispatchers office and outlying unattended way-' side stations, to permit the tram dispatcher to determine when trams pass any outlymg station, and to also permit the train dis- M patcher to signal trains passing any outlying station.

r ing an embodiment of the present invention in a more or less dlagram'maticmannery Fig. 2 is a plan view of certain of the mechanism illustrated in Fig. 1, and located at an outlying point;

Fig. 3 is a vertical section taken on the line 3-3 of Fig. 1, as is indicated by the arrows; v

Fig. 4 is a horizontal section taken on the line llof Fig. 1, as is indicated by the arrows; 7

Fig. 5 is a vertical section taken on the line 55 of Fig. 4, as is indicated by the arrows;

Fig. 6 is a detailed view of the drum shown most prominently in Fig. 3, portions of the drum being broken away to more clearly show the construction thereof;

Fig. 7 is a detailed View of the rotary cam L U switch most prominently shown in Fig.1, certain of the parts being broken away to show the construction thereof;

Fig. 8 is a-vertical section taken on the line 8-8 of Fig. 2, as is indicated by the arrows;

Fig. 9 is a horizontal section taken on the line 99 of Fig. 3, as is indicated by the arrows; i

Fig. 10 is a section taken on the line 1010 through one of the selector keys, asis indicated in Fig. 1;

Fig. 11 is a view in front elevation of a wayside railway station showing the location of certain of the parts of the present device therein,.- and a Fig.' 12 is a wiring diagram of the complete device.

The present invention is illustrated as being used in connection with a railway system. In the wiring diagram, the parts located at a train dispatchers oihce are designated generally by the letter A, while parts located at wayside stations, such as the station G, are designated generally by the letter B. The mechanism B for only one wayside station is illustrated, it being understood that the mechanism in each wayside station will be simila to that illustrated.

An electric transmission line, comprising the two wires 13 and 14, runs between the dispatchers ofiice and through all of the wayside stations' Atthe dispatchers office are situated a number of selector keys 15 which are of common construction and each of these keys, when operated in connection with a selector mechanism, such as the selector mechanism 16, illustrated by a-boX in Fig. l of the drawings, the wiring diagram of which shown in 12, is adapted to operate a certain selective mechanism 17 indicated by .a box in Fig. 1, the wiring diagram of which is shown in Fig. 12 and which is located at a way-side station. The signal from the selecmechanism 17 may be used in connection with I tor mechanism 16 runs through a transmission included in the Gill selector system now extensively used by rail-roads. The Gill selector system embodies one or more of the Ed ward R. Gill patents, such as Patent No. 906,- 523 issued Dec. 15th, 1908, together with the improvements thereon. At the present time,

there are a number of selector-keys 15 in each train dispatchers oflice corresponding in number to the number'of way-side stations under the control of the train dispatcher, and in each wayside-station there is a selective mechanism 17 which, when a certain key is dialed, will respond to the signal transmitted through the transmission line 181 leading from the dispatchers oflice to the wayside stations. Let us consider that the particular key 15, to which the selective mechanism 17 at the wayside station illustrated, is responsive, is the key 15. The two conductors from all the keys 15 to the selector mechanism 16 are designated by the numerals 1819; the two conductors from the selector mechanism 16 to the wires 1314 are 20-21 respectively and the two conductors from the wires 13-14 respectively, to the particular selective mechanism 17 at the wayside station are designated by the numerals 22-23 respectively. At each wayside station there is situated a double throw knife switch. 2 1, having two contacts 25 and 26, to which the blades of the knife switch are pivoted and two contacts 27 and 28 into which the blades of the switch are adapted to be thrown into engagement. A battery 29, or similar source of electricity, is provided and conductors 30 and 31 leading from the battery 29 run to the contacts 25 and 26 respectivelv of the knife switch. From the two contacts 27 and 28, conductors 32 and 33 run to a bell 34.

When the sector key 15 is operated. a sin:- nal will pass from the selector mechanism 16 through conductors 20 and 21 to the line wires 13 and. 14. through. the conductors 22 and 23 to operate the selective me hanism 17. If the knife switch 2 1 is thrown into engagement with the two contacts 27 and 28; a circuit will be temporarily setup from the battery 29 through conductors 30 and 3-.. knife switch. 24, contacts 27 and 28, conductors 32 and 33 to the bell 34. The bell 34 will, accordingly, be temporarily run 51. The equipment thus far described. is now commonly used in railway systems for use between the train dispatchers oifice and wayside stations, to permit ringing of a bell in a wayside station to attract the attention of the attendant. The attendant on hearing the bell will communicate by telephone or telegraph with the train dispatcher, whereupon the dispatcher can inform the attendant of any in-- formation necessary.

The keys 15 commonly used are of the windup type and when a key is turned as far as possible in a clockwise direction, and then released, it will automatically turn back to its original position, turning in a counterclockwise direction to energize the selector mechanism 16 and its particular selective mechanism 17 continuously until the key has returned to its extreme counterclockwise position. If therefore, any key after being dialed is held during its travel in a counterclockwise direction, the impuise from the selector mechanism to the selectivemechanism will be continuously given, thereby causing the bell 3 1 to be continuously rung it the knife switch is in engagement with corn tacts 27 and 28. I have provided a simple 'mechanism for holding a selector key 15 to pre.-'ent' its returning to extreme counter-- dockwise position after being dialed, and this mechanism comprises merely a removable disk 35 having a pair of holes punched therein, whereby the disk can be placed over the handles of a key 15. Each disk 35 has a tooth 350: formed on the periphery thereof, and a hook 36 pivoted to a fixed support, is placed in such position that when the disk is mounted as is illustrated at the top of Fi 1, with the tooth projecting in a counterclockwise direction relative to the directi on of rotation of the key, the tooth will engage with the hook 36, thereby preventing the key from rotating to its extreme counterclockwise position after the key has been wound up. -W'hen the disk 35 is applied to a key, so that the tooth 35a projects in a counterclockwise direction, one. side of the disk will face outwardly which may be designated the light side, and when the disk is applied to a key so'that the tooth 35a projects in a clockwise direction, the other side of the disk will project outwardly and this side may be designated the call side, as shownin Fin. 1. hen the call side faces outwardly, the tooth 35a will not engage with the hook 36 after the key has been wound up and a continuous impulse will, therefore, not be imparted to the selective mechanism. Any simple holding means may be substituted for the disk 35 and the hook 36 to hold the key 15 in ringing position. I

The device above briefly described, and now commonly in use, serves very nicely for communication between a train dispatchers office and wayside stations having attendants-thereat at all times. At the present time, however, there are many wayside stations where there is no operator on duty for a considrable portion of the day and night, and it is of importance that the train dispatcher have some means for knowing when trains pass such an unattended wayside station, and that also the train dispatcher have some means for signaling trains passing such unattended wayside stat1ons in case of accident on the line, or for other reasons. The

present invention, therefore, is provided'for use in combination with the parts thus far described when the wayside station unattended. At the present time, when the operator leaves the wayside station, it is customary for him. to open the knife switch 24. In accordance with the present invention, a second set of contacts 37 and 38 are provided into which the knife switch 24 may be thrown in engagement when the attendant leaves the wayside station. The contacts 37 and 38ers connected by conductors 39 and 40 to a relay 41 secured by a suitable bracket to one end of an insulated plate 42 mounted preferably in horizontal relation at the wayside station. Secured to the plate 42 and projecting up wardly therefrom are a number of posts which, for convenience in description, will be designated respectively 43, 44, 45, 46 and 47. The posts 43, 44, 45, and 46 are mounted in rectangular spaced relationship, and a plate 48 is secured to the upper ends thereof. The armature 49 for the relay 41 is secured to the rear end of a lever 50 intermedially pivoted to a bracket 51 mounted on the plate 42, and the free or inner end of the lever 50 is forked and straddles a'square vertically disposed dr'um shaft 52 having rounded portions adjacent each end journaled in the two plates 42 and 48. Mounted on the square drum shaft 52 for vertical sliding movement thereon, is a drum 53 having two heads 53wprovided with rectangular apertures through which shaft 52 projects. Rings 535, formed from insulating material, are interposed between the two heads 53a, and they are. rabbeted'at the outer sides of their joining portions to form a groove within which is situated a conductor ring 54 formed from copper, or similar conducting material. The conductor ring 54 lies flush with the outer surfaces of the rings 53b and at one portion of the ring 54 adjacent the vertical center therof, there is situated an insulated clock 55, the outer surface of which lies flush with the conductor ring. Bearing against the conductor ring 55 and secured as to the post 43, is a spring contact 56 which stands at a level with the insulated block 55 when the drum 53 is downwardly slid to its lowest position on the shaft 52, so that the drum rests on the forked end of the lever 50, when the armature 49 is raised from the upper end of the relay 41. Bearing against the conductor ring 54 and secured as to the post 44, is a second spring contact 57 which stands at r a higher level than the contact 56, the difference in level being the distance that the drum 53 wil rise when the relay 41 is energized, to-attract the armature 49 and rock the lever 50 to slide the drum upwardly. Itshould be here explained that when the drum 53 is at rest, the contact 56 will normally engage the insulated block 55. When the relay 41 is energized, however, the

drum 53 and, accordingly, the insulated block 55 will be raised to such a position that the will be in such position that after the drum,

53 has rotated through 360 in a clockwise direction, as is illustrated in Fig. 12, the insulated bloclr 55 will come into engagement with the contact 57. The two contacts 56 and 5'? are, accordingly, spaced 360 apart relative to the direction of rotation of the drum 53.

Mounted on the plate 42 is a motor 58, the motor shaft 59 of which is in alinement with a horizont shaft 60 journaled in the two rear posts 45 and 46 and held from movement toward the motor shaft 59 by means of a collar 61. The adjacent end of the shaft 60 is spaced a short QlStQlHG from one end of the motor shaft 59, and is secured thereto by means of a coiled spring 62, the spring 62 being provided to take up any jar on the shafts 60 and parts connected thereto when the motor is first started. A vertical shaft- 63 journaled in the two plates 42 and 48 at one side of the drum shaft 52, carries a worm gear 64 adapted to be driven from aworm 65 mounted on the horizontal shaft 60 and in mesh with the worm gear 64. The shaft 63 projects for a short distance above the upper plate 48 and carries a small. pinion 66 in mesh with and adapted to drim a large gear 67 carried on one of the di 1 shaft 52 which projects above the upper plate 48. Any other type of suitable transmission mechanism may be provided for driving the drum shaft 52 from the motor 58, it being preferable to cause the drum shaft to rotate at a much lower speed than the motor. A suitable source of electricity, such as the battery 68, is pro 'ided at the wayside station and a conductor 69 leading from one side of the source of electricity 68 runs to and is connected to the spring contact 57. A second conductor 70- leads from the spring contact 56 to the motor 58, while athird conductor 71 leads from the motor to a safety spring contact 7 2, mounted on a block 73 and normally in ient with a short block 74 secured to the pl. ye 42 and connected by conductor 7 5 to the other side of the battery. Small slots 42% are provided in the plate 42 immediately below the block 73 and bolts 7 6, having heads projecting above the safety spring contact 42 and spaced from each other, project from the block T3 through the slots 42a, and are secured at their lower ends to a plate 77. A coil. tension spring '78, is connected at one end to the plate 77, and at its other end to a lined stud T9, and the spring 7 8 will normally move and hold the safety springcontact 7 2 toward the block 7 t, so that engagement will be made between the spring contact and the block 74. Under normal conditions, therefore, when neither one of the spring contacts 56 and 57 are in engagement with the insulated block 55, on the drum a motor-circuit will be closed leading from the source of electricity 68 through conductor 69, spring contact 57, conductor ring 54, spring contact 56, conductor 70 to motor 58 and thence through conductor 71, safety spring contact 7 2, block 74 and conductor 7 5 back to the source of electricity 68. When the relay 4:1 is temporarily energized, therefore, the armature e9 will be attracted causing lever 51 to temporarily slide the drum 52 upwardly until the motor circuit is made. The motor will then be set in operation to rotate the motor shaft 59, spring 62, shaft 60, worm 65, worm gear 64, shaft 63, pinion 66, gear 67, drum shaft 52, drum 53 and conductor ring 5%. If the relay 41 is but temporarily energized, the drum 53 will be rotated but a short distance before the drum slides by gravity downwardly to its normally lowermost position. Accordingly, when the relay is temporarily energized, the drum 53 will make a complete revolution before either contact 56 or 5'? comes into engagement with the insulated block As soon as the complete revolution is made, however, the insulated block 55 will be rotated to a position to engage spring contact 56, whereupon the motor circuit will be broken. If the relay ll'be continuousry energized, the drum 53 will remain in raised position during the time that the motor 58 is rotating, thereby causing the drum to be turned five-sixths of a revolution, or until the insulated block 55 engages the spring contact 57, whereupon the motor circuit will be broken. lVhen the relay 11 is then (lo-energized, the drum 53 will drop to permit the motor circui to be again established and permit the drum 53 to be rotated until the insulated block again engages the spring contact 5 ,i. e. the drum will be rotated one-sirrth of revolution to complete a full hitherto uncompleted revolution of the drum.

Referring now particularly to Figs. 3, 4 and 5, it will be seen that there is a pin 80 carried on the lower head 53a of the drum 53, and this pin, when the drum has been rotated to such a position that the insulated block 53 is in engagement with the spring contact 56, will project straight forwardly from the drum. Mounted in suitable guides 81, scoured respectively to the two posts 43 and 44, is a sliding bar 82 having an arm 83 adjacent its left end projecting downwardly to a point between the upper ends of the bolts 76 and int-he same vertical plane therewith. A small tension spring 84: connected to the bar 82 and to one of the guides 81, normally forces the bar to the right, as viewed in full lines Fig. 5. The pin 80, when the contact 56 is in engagement with the insulated block on the drum 53, will project into a slot 82a formed in the bar 82, and the pin will bear against a vertical shoulder 82?) projecting upwardly from the bottom of the slot 8264 at a point approximately directly in front of the central axis of the shaft 52. The height of the shoulder 82?) will correspond to the Vertical movement of which the drum 53 is capable when the relay 41 is energized. At the right of the shoulder 82b and projecting downwardly from the top of the slot 82a is a pin 820. It will be noted that the arm 83 is normally disposed a little to the right of the extreme right hand position of the left bolt 76. lVhen the drum 53 is raised, as the relay 41 is energized, the pin will be raised to a point above the shoulder 82?). If the drum 53 begins to rotate before the pin 80 is raised entirely above the shoulder 826, the bar 82 will be slid a short distance to the left against the tension of spring 84, but this sliding movement will not be sui'licient to cause the arm 83 to contact the upper end of the left bolt 76. If then the pin is raised momentarily above the shoulder 825, the insulated block 55 on the drum will be raised to a point above the spring contact 56, thereby causing the motor 58 to be, at least, temporarily rotated. This will cause the pin 80 to be carried a short distance beyond the shoulder 826 above the same. If then the relay i1 is practically instantaneously de-energized, there will be no possibility that the drum 53 can slide downwardly on the shaft 52, to cause the insulated block 55 to again engage the spring contact 56 and thus break the motor circuit. The pin 80 is, therefore, bound to cause the motor circuit to be made until the drum 53 has been rotated to a point where the insulated block 55 will not engage the contact 56 even if the drum 53 should slide downwardly on the shaft 52. When the motor is thus once started, it must continue to operate until the drum 53 has been rotated through, at least, five-sixths of a revolution, or until the insulated block, due to the continued rotation of the drum, comes into engagement with one of the contacts 57 or 56. If, for any reason, the drum has not slid downwardly on the shaft 52, after the insulated block 55 has passed the position of the spring contact 57, the pin 80 will strike the pin 82c, whereupon as the drum continues to rotate, the pin 80 acting against the pin 820 will slide the bar 82 to the left, thereby causing the arm 83 to strike the upper end of the bolt 7 6 and to slide block 7 3, safety spring contact 72 and plate 77 to the leftagainst the tension of the spring 7 8, whereupon the spring contact 72 will be disengaged from the block 74. This will break the motor circuit and none of the parts of the mechanism at the wayside station will be capable of being operated, except the relay 41,1mtil such time as repairs are made. A

saf 'uard is thus provided to prevent theops eration of the device in case anything goes wrong in the operation of the drum 53.

At the left of the drum shaft 53,'as illu'strated in the drawings, a vertical rotary switch shaft 85, as best shown in Figs. 1, 4 and 5 is ournaled in the two plates 42 and 48.. The drum shaft 52 projects downwardly is preferred to rotate the shaft 85 once while the shaft 52 is rotated three times. The shaft 85 carries a. cylinder 88 disposed between the two plates 42 and 48 and formed from in sulating material, and the. cylinder pref erably has four spaced peripheral grooves 88a therein. Situated within the three upperinost grooves 88a and having two-thirds of their surfaces flush with the surfaces of the cylinder 88 are cams 89, 90 and 91 re spectively, reading from top to bottom, as best shown in Fig. 7. One-third of the outer surfaces of each of the cams 8,9, 90 and 91 will be disposed inwardly from the outer surfaces of the cylinder 88, and the so-called' depressed portions will be preferably disposed in vertical alinement. A fourth cam 92 formed from conducting material is disposed in the lowermost groove 88a of the cylinder 88 but this cam, unlike the cams 89, 90 and 91, will have two-thirds of its surface depressed below the surfaces of the cylinder 88 and only one-third of its surfaces will project flush with the surfaces of the cylinder. As the drum 53 will be driven in a clockwise direction, as viewed in the drawings, and as indicated in Fig. 12, it will be apparent that the shaft 85 and cylinder 88 will be driven in a counterclockwise direction as is also indicated in Fig. 12. The portion of cam 92 flush with the surface of the drum 88, is set 120 behind the portions of the cams 89, 90 and 91, which are flush with the surface of the drum 88. Secured'to the post 47, at the left end of the plate 42, are four pair of spring contacts. These spring confacts are best illustrated in Figs. 1, 3 and 12. The uppermost pair of contacts 93 and 94 are disposed opposite the uppermost cam 89 and the surfaces of the cam. 89, flush with the cylinder 88, is adapted to earn the contact 93 into engagement with the contact 94, the

cont-act 93 being under normal spring tension to move away from the contact 94 into the upper groove 88a at the depressed portion of the cam 89, when the drum 88 is rotated to such a position that thecontact 93 no longer strikes the portion of the cam 89 flush with the drum. 88. Similar spring contacts 95 and 96 are mounted on the post 47 immediately below the spring contacts 93 and 94,

and the spring contacts 95 and 96 are adapted to act in a similar relation to the cam 90 as the spring contacts 93 and 94 act in respect to the cam 89. Spring cams 97 and 98 mounted on the post 47 below the contacts 95 and 96 are adapted to be disposed and to act in a similar relation relative to the cam 91. Similar spring contacts 99 and 100 mounted below the contacts 97 and 98 on post 47, are adapted to be mounted and to act in a similar relation relative to the cam 92. Suitable binding posts 101 are secured to each of the contacts 93 to 100 inclusive, and the various contacts 93, 95, 97 and 99 are held out of electrical engagement with the respective spring contacts 94, 96, 98 and 100 at their secured ends by means of suitable insulating plates 102. The cam contacting portions of contacts 93, 95', 97 and 99 are all disposed in vertical alinement and, as shown, they are situated directly in front of the axial center of the rotary switch shaft 85, and these contactportions are normally disposed 40 ahead of the surfaces of cams 89, 90 and 91 flush with the cylinder 88 relative to the direction of rotation of the shaft 85 and cylinder. The cam contacting portions of the various spring contacts 93, 95, 97 and 99 are, therefore, disposed 160 ahead of the portion of the cam 92' flush with the cylinder 88 relative to the direction of rotation of the shaft 85 and cylinder 88. Accordingly, when the drum shaft 52 is first rotated, from a position where the spring contact 56 is in engagement with the insulated block 55, the drum shaft 52 must-be rotated one-third of a revolution before the spring contacts 93, 95, and 97 will be engaged by the cams 89, 90 and 91 to cause contacts 93 and 94, 95 and 96, and 97 and 98 respectively, to be thrown into engage ment and the drum shaft 52 must be rotated one and one-third revolutions before the cam 92 will force the cont-act 99 into engagement with the contact 100. Also the drum shaft 52 must be rotated two and one-third revolutions before the various contacts 93, 95,

.97 and 99 willspring apart from their respective contacts 94, 96, 98 and 100 after once being in engagement therewith.

The plates 42 and 48, and parts associated therewith, may be situated in any desired location at a wayside station. A telephone transmitter designated by the numeral 103 and having a megaphone 104 connected, to the forward end thereof, is also located at the wayside station, but the transmitter is so disposed inthe station that the megaphone will be located outside of the station and in such position that when the transmitter is energized, it will be affected by the noise of passing trains. In Fig. 11, the transmitter, is shown as being located in a small cupola 105 mounted at the top of the station C. An induction coil 106 is located at the station, as is also a condenser 107 One side of the battery 68, or other source of electricity, is connected by the conductor 108 to the telephone transmitter 103, and a second conductor 109 leads from the transmitter 103 to the spring contact 97, which is adapted to engage conductor cam 91, conductor 109 being connected to the binding post 101 connected to contact 97. Another conductor 110 1 secured to the binding post 101 connected to conductor 98 leads to the primary coil 106a of induction coil 106, and another conductor 111 leads from the primary coil 10664 to the safety spring contact 72. Accordingly, when the two spring contacts 97 and 98 are in engagement, a circuit will be set up leading from the source of electricity 68 through conductor 108 to telephone transmitter 103 thence through conductor 109, contacts 97 and 98, conductor '110 to the primary coil 106a of the induction coil 106, and thence through conductor 111, safety spring contact 72, block 74 and conductor 75 back to the source of electricity 68. From the wire 13 of the transmission line between the dispatchers office and the wayside station, a conductor 112 leads to the bindin post 101 connected with spring contact 94, and a second conductor 113 leads from the binding post 101 connected with spring contact 93 to the secondary coil 1066 of the induction coil, there being a conductor 114 leading from the secondary coil 1066 to the condenser 107 and there being a conductor 115 leading from the condenser 107 to the binding post secondary coil 1066 of the induction coil,

conductor 114, condenser 107, conductor 115, spring contacts 95 and 96 through conductor 116 to the transmission line wire 14. It will be here noted that the spring contacts 93 and 94 act as a break and make switch between the line wire 13, and the secondary coil 1066 of the induction coil 106, and that the spring contacts 95 and 96 act as a break and make switch between the secondary coil 1066 of the induction coil 106 and the line wire 14.

Referring now to the electrical diagram of the dispatchers office, as shown in Fig. 12, there is a conductor 117 leading from the wire 13 of the trans-mission line to the secondary coil 118a of an induction coil 118, situated at the dispatchers oiiice, and another conductor 119 leads from the secondary coil 118a to a condenser 120, there being a conductor 121 leading from the condenser 120 to the other 1 wire 14 of the transmission line. 'A conductor 122 leads from a battery 123 to a telephone receiver 124 at the dispatchers office and a conductor 125 leads from the telephone receiver 124 to the primary coil 1186 of induction coil 118, a short conductor 126 leading from the primary coil 1186 to the other side of the battery 123. When the spring contacts 93, 95 and 97 are in engagement with their respective contacts 94, 96 and 98, it will be seen that a telephone circuit will be set up from the transmitter 103 through the transmission line 1314 to the receiver 124, and that when this circuit is set up, the noise of trains passing the wayside station can be heard through the receiver 124 due to the location of the transmitter 103.

Two electrically operating signal devices are used, one for signaling trains passing the wayside station in one direction which, for convenience, in illustration, will be considered a westward direction, and the other of which is adapted to signal trains passing the wayside station in an opposite direction which, for convenience, will be designated an eastward direction. Although different types of signal devices can be used, those shown in the drawings are merely electric lights, the two electric bulbs of which are designated 127 and 128 respectively, the bulb 127 furnishing the light adapted to signal west bound trains, and the bulb 128 furnishing the light adapted to signal east bound trains. The two bulbs 127 and 128 are preferably mounted in electric light sockets 139 secured in such a manner that the bulb 127 will be observable only from trains passing the wayside station in a westerly direction, while the bulb 128 will be observable only from trains passing the wayside station in an easterly direction. In Fig. 1, the two bulbs 127 and 128 are shown as being separated by a vertical partition 130, while in Fig. 11, the two bulbs are shown as being mounted in the cupola 105, there being a partition, or partitions, between the two bulbs. From the conductor 108, a conductor 131 leads to the binding post to which the spring contact 99 is secured. A conductor 132 connected to the binding post 101, to which spring contact 100 is secured, leads to the socket 129 for the bulb 128. A conductor 133 leads from the socket 129 of the bulb 127 to a spring contact 134 mounted on a small insulated block 135 secured to the bottom of the top plate 48. A conductor 136 leads from the conductor 132 to the socket 129 for the bulb 127, and another conductor 137 leads from the socket 129 for the bulb 127 and is secured to a spring contact 138 secured to insulated block 139 also secured to the bottom of the plate 48. A conductor 140 is secured at one end to a stud 141 projecting downwardly from the plate 48 and carrying a disk switch 142, the other end of the conductor 140 being secured to the safety spring contact 72.

As best illustrated in Figs. 3, 8 and 9 of the drawings, the stud 141 is mounted on the disk projects over the drum, as best shown in Figs. 8 and S). The disk is cut away at its lower end, as illustrated, to form four long downwardly 131O3G9Ct111g pins 142d 01 sector-shape in horizontal cross section, and

four short downwardly projecting pins 142?) also for sectonshape in horizontal cross section. The long pins 142a and the short pins 142?) are alternately arranged in respect to each other on the circumference of the disk 142, and each pin is circuinferentially spaced from its neighbor. The pins 142a'will project downwardly to points closer to the top oi the drum 53 than the pins 142?). A pin is carried on the upper head 53a of the drum 53,.and projects upwardly therefrom. If the disk 142 he so disposed that one of the pins 142a projects over th drum 53, the pin on the drum will strike the said pin 142a during rotation of the drum to'rotato r 142 through 45. If, however, one 1 pins 1421) is disposed directly over the drum 53 and it the drum is in down wardly slid position on the drum shaft 52, when the pin 143 passes below the disk 142, the pin 143 will not strike the pin 1425 disposed over the drum and no movement of the disk 142 will take place. If, however, the oruin 53 is in upwardly raised position, is indicated in dotted lines Fig. 8, when the pin 143 passes below the disk 142 and a pin 1427) disposed over the drum 53, then the pin 143 vil strike the so disposed pin 1427), and the disk will then. be rotated through 45 to a position where one of the pins 142a will stand ahove the drum 53. The disk 142 on its upper side is provided with two diametrical grooves 1420 intersecting each other at right angles, and forming tour open spaces on the outer surface of the disk adjacent the upper end thereof, between which are disposed engaging portions 1424 for the two spring contacts 134 and 133. 'llhe grooves 1420 cause the four contact engaging portions to be spaced from each other by 45. The two spring contacts 134 and 133 are so disposed that they will lie in the same horizor -l plane as the contact engaging portions Li (Z of the disk 142, and the ends of he out of engagement with any portion of the disk and will fit within one of the grooves 1420. The contacts 134 and 138 are so disposed, as shown in the drawings, that when one of the short pins 142?) is disposed above the drum 53, spring contact 138 will engage one of the contact engaging portions 142d of the disk, while when one of the long pins 142a of the disk stands over the drum 53.. the spring contact 134 will he in engagement with one of the contact engaging portions 142d, It will be apparent that when the contact 138 is in engagement with the disk 142, and when the spring contact 99 is in engagement with the spring contact 100, a westward light circuit will be established from the battery 68 through conductor 108, conductor 131, spring contacts and 100 and conductors 132 and 136 to the signal west-ward lamp 127, and thence from the lamp through conductor 13?, contact 138, disk 142, stud 141, conductor 140 to safety spring contact 72 and thence to block 74 and conductor 75 back to the battery 68. It will also he apparent that when. this westward. signal cir cuit is established, the eastward signal circuit cannot be estahlishe due to the taco that spring contact 134 will not engage disk 142. When spring contact 134 is in engage ment with disk 142 and contacts 99 and 100 are in engagement, the eastern signal circuit will be established from one side of the bat-- tery or source of electricity, through conductors 108, and 131, contacts 99 and 100, conductor 132 to the east signal lamp 128, and thence through conductor 133, contact 134, disk 142, stud 141, conductor 140 to the safety spring contact 72 and thence to block 74 and conductor 75 to the other side of the battery. It will also he noted that when the eastward signal circuit is established, the westward signal circuit will he broken due to the fact that contact 138 will no longer engage the disk 142.

A telegraph sounder 144 is mounted directly ahead of the megaphone 104 connected to the telephone transmitter 103, as is best illustrated in the wiringdiagram Fig. 12. Secured to the gear 67 at the upper end of the drum shaft 52, and projecting upwardly from the gear, are six pins 145, which pins are regularly spaced relative to each other and to the center of the shaft 52. A pair of spring contacts 146 and 147 are suitably mounted on a block 148 of insulating material, so that the outer end of the contact 146 will project into the path of the pins 145 during the rotation of the gear 67. The two spring contacts 146 and 147 are normally held in spaced relation from each other at their outer ends, and are insulated from each other at their inner ends by the block 148. A small insulating disk149, is carried at the extreme outer end of the spring contact 146, and as the gear 67 rotates, the pins 145 will strike the insulated disk 149 to bend the contact 146 toward the contact 147 to cause the said two contacts to engage each time that a pin passes the contact 146. A battery 150, or similar source of electricity, is provided for enerthird conductor 153 leads from the sounder to the other side of the battery 150. It will, accordingly, be apparent that a circuit will be made from the battery 150, or similar source of electricity, to the sounder each time that the two contacts 146 and 147 are thrown into engagement, and each time that the circuit is made, the sounder will click and this click may be heard through the receiver 124 at the dispatchers ofiice if the telephone circuit from the transmitter 103 through the line 1314 to the receiver 124, is made.

Operation Considering the parts to be installed as described, when an operator leaves a wayside station such as the station C unattended, he will throw tne knife switch 24 into engagement with the two contacts 37 and 38. The train dispatcher knowing that a certain train should pass through the wayside station at a certain time, will dial the selector key 15 for the wayside station C a first time shortly before the train is due at. the wayside station. When the key 15 is dialed, a certain signal will be sent out by the selector mechanism 16 through the line 13 14 to the selective mechanisms 17 at. all. of the various wayside stations connected with the line 13-14. The selective mechanism 17 at the wayside station C will be the only one which will respond to the particular signal given, whereupon a circuit will be temporaril set up from the battery 29 to energize the relay 41 temporarily at the wayside station 0. As the relay 41 is energized, the

o drum 53 will be raised through the medium of the lever 50, thereby throwing the insulated block out of engagement with the spring contact 55, to close the motor circuit from the battery, or source of electricity 68, to the motor through the contact 55, conductor ring 54 and contact 57. The motor will then be operated to rotate the drum 53 through a complete revolution, or until the insulated block 55 again engages the contact 56, whereupon the motor circuit will be broken. As the drum 53 rotates through a complete revolution, the cylinder 88 will be rotated through one-third of a revolution. lvhen the drum 53 initially starts to rotate, the cams 89, 90, 91 and 92 will all be out of engagement with the contacts 93, 95, 97 and 99 respectively, and the cylinder 88 must be rotated through 40 before the cams 89, 90 and 91 will engage the contacts 93, 95 and 97 respectively. Accordingly, the drum 53 will be rotated through one-third of a revolution before the cams 89, 90 and 91 will strike the contacts 93, 95 and 97 to cause the telephone circuit from the transmitter 103 to the receiver 124 through the line 1314 to be established. The telephone circuit will then not be established until after two pins 145 on the gears 67 have passed the spring contact 146, but after these two pins have passed the contact 146, the circuit will be established so that as the remaining four pins 145 strike and pass the contact 146 during the first complete revolution of the drum 53, the sounder 144 will click four times and these four clicks will be heard by the dispatcher through the receiver 124. The dispatcher will then know that the telephone circuit is set up and he, by keeping his ear to the receiver 124, can hear a train as it passes the wayside station and he can thus check up to determine whether the train is running on time or not. In actual practice, it has been found that passenger trains passing the wayside station can be distinguished by certain characteristic noises from freight trains passing the station and, accordingly, the dispatcher can tell which class of train passes the station.

During the first complete revolution of the drum 53, the cam 92 will not engage contact 99 to throw the two contacts 99 and 100 into engagement and, accordingly, neither signal circuit will be made. During the first complete revolution of the drum 53, the pin 143 carried at the top of the drum, will either strike none of the pins 142a or 142?) on disk 142, or the pin 143 will strike one of the long pins 1420: to swing the disk to such a position that a short pin 142?) extends over the drum as shown in full lines Fig. 8, whereupon the contact 134 will be held out of engagement with the disk 142, and the contact 138 will be held in engagement with a contact engaging portion 142d of the disk 142. The contacts 134 and 138 together with the disk 142, will assume the position shown in the wiring diagram Fig. 12.

If the train to pass the wayside station 0 be a west bound train, and if the train dispatcher desires to signal this train for any reason, as, for instance, to inform the engineer of the train that there is a wreck on the track, he will merely dial the selector key 15 a second time and release the same. This will again cause the relay 41 to be temporarily energized, thereby causing the drum 53 to rotate through a second complete revolution. During this second revolution, the cylinder 88 will be rotated through a second one-third of a complete revolution, or through 120. During this second movement of the cylinder, the contacts 93, 95 and 97 will be maintained in engagement with their respective contacts 94, 96 and 98 to maintain the telephone circuit in closed condition and, accordingly, six clicks from the sounder caused by the pins 145, striking and passing contact 146: and thereby operating the sounder 144, will be heard through the receiver 124. As cam 92 will not strike the contact 99 until the cylin-, der 88 has been rotated through 160, but will then strike contact 99 to throw the same into engagement with contact 100, the west bound signal circuit will be established and the lamp 127 will. be lit. inasmuch as the contact 138 is in engagement with the disk 142. As the west bound train comes into the station, the engineer will observe the signal lamp 127, which is now lit, and he will thus be apprised of whatever intormation the lighting of the signal lamp 127is chosen to convey to him.

After the west bound train has passed through the Wayside station C, the key 15' will again be turned and released to cause the relay 41 to be energized a third time. As the relay 41 is energized the third time, the drum 53 will make a third complete revolution, thereby causing the cylinder 88' to be turned through another 120, or through its last third of a revolution to complete a first single revolution of the cylinder. The cams 89, 90, 91 and 92 will hold the contacts 93, 95, 97 and 99 respectively in engagement with their respective contacts 94, 96, 98 and 100 during the first third of the third revolution of the drum 53, i. e., until the various cams 89, 90, 91 and 92 have been moved through 40 during the third movement thereof,

whereupon thevarious contacts 93, 95, 97 and 99 will be released from engagement with the cams 89, 90, 91 and 92 respectively, to cause the said contacts to break engagement with their respective contacts 94, 96, 98 and 100. Accordingly, the telephone circuit andthe west signal circuit will bebroken after the drum 53 has been moved one-third of a revolution during its third complete revolution. As the'iirst two pins 145 on gear 67 strike and pass the contact 146, and as the sounder responds thereto, these two clicks will be heard through the receiver 124, but none of the remaining clicks from the sounder will he heard as the drum 53 continues to rotate through the remainder of its third revolution. The dispatcher hearing the two clicks will know that the telephone circuit and signal circuit are both broken and that all parts of the device at station C are reset in their original positions.

If after the relay 41 has been energized the first time, it is desired to signal an east bound train rather than west bound train, the selector key 15 will be held in dialed'or ringing condition when it is actuated the second time. To cause the relay 41 to be continuously energized, the key can be easily held in partially wound or continuously ringuq osition by use of the disk 35 and hook 36 illustrated in Figs. 1 and 10, the disk 35 being applied with the light side facing out,

so thatthe tooth 35a will be caught by the hook 36 after the key has been wound up and starts to run down. Whenthe relay 41 is continuously energized during the second energiz'ation thereof, the drum 53 will be held in upwardly slid position during its rota: tion and, accordingly, the insulated block 55 will be carried into engagement with the contact 57 after-the drum has Ina defive-sixths of a complete second revolution, whereupon the motor circuit will be broken. During this partial second revolution, the pin 143 carried at the top of the drum 53, being in raised position as indicated in'dotted lines Fig. 8, will strike one of the short pins142b of the disk 142, thereby causing the disk to rotate through to carry the disk out of engagement with the spring contact 138 and into engagement with the contact 134. Accordingly, the east bound signal circuit will be made and the east bound bulb 128 will be lit up to signal the east bound train. During the time that the drum 53 is making five-sixths of a revolution during its second actuation, the telephone circuit will be made as before, and five oi the pins 145 will strike and pass the contact 146 to cause the sounder to click five times only, and these clicks willbe heard through the receiver 124. The dispatcher,

accordingly, when he hears only five clicks at the receiver will know that the east bound signal is operated.

After or before the east bound train has passed the wayside station C, the hook .36 can be disengaged from the tooth 35a of the disk 35 applied to the key 15, whereupon the relay 41 will be de-energized, thereby causing the drum 53 to drop downwardly to move the insulated block below the spring contact 57, and permit the motor circuit to be again established. The drum 53 will then rotate through one-sixth of a revolution, or until the insulated block 55 strikes the spring contact 56. During this time, the telephone circuit will be established and as one pin 145 will strike and pass the contact 146, one click from the sounder 144 will be heard through the receiver 124. The dispatcher when he hears the lone click, will know that the drum v the key 15' will bea third time dialed to energize the relay 41 a third time as before, and to cause the drum 53 to make a third complete revolution. During this revolution, the various circuits will be broken as above described. in connection with the third revolution of the drum 53 after the west bound signal. has been operated, but in addition thereto the disk 142 will be rotated to its original position. The pin 143 will strike one of the long pins 142a which now stands over the drum 53 and the disk 142 will be rotated through 45, or to such a position that one of the short pins 1426 stands above the drum 53. Accordingly, the disk 142 will be reset, so that the contact 138 is in engagement with the disk, while the contact 134 will be out of engagement with the disk. All the parts will then be reset in their original position.

It will be seen that a difl'erent signal from the sounder 144 will be heard through the receiver 124 each time that the drum 53 is actuated. Accordingly, the train dispatcher will always be able to determine whetherethe various mechanisms at any particular wayside station are properly operating. If, for any reason, the drum 53 should stick in its up wardly slid position, so as to prevent of the proper operation of the device, safety spring contact 42 will be carried out of engagement with the block 7 4 to disconnect both the telephone circuit and the signal circuits. By providing make and break contact switches 93, 94 and 95 and 96 respectively, between the two line wires 1314, and the secondary coil 1066 of the induction coil 106 at the wayside station, no ground can occur in the transmission line 1314 in any possible manner. The switch throwing mechanism for making and breaking the various circuits is capable of considerable variation. Any type of signal device can be substituted for the electric lamps 127 and 128, and diiierent signal systems can be provided for indicating to the dispatcher that certain things have been done at a particular wayside station. The present device does not change the equipment now in use in railway systems but merely operates in conjunction therewith. It will, of course, be understood that the inventor does not wish to limit himself to the use of the present device in railway systems, inasmuch as it is capable of other uses. y

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the various parts without departing from the scope of the present invention.

What is claimed is:

1. A communicating device for use between a first point and a second point, having in combination, an electrically operating actuating mechanism at the second point tending to remain and return to one position but adapted when energized to move to a second position, means operative at the first point to cause said actuating mechanism to be energized, a sound transmitter at said second point mounted to be aiiected by noises at said second point, asound receiver atsaid first point, a signal device at said second point, means adapted to be operated when said actuating mechanism is first energized to put said sound transmitter into electrical communication with said sound receiver, means adapted to be operated when said actuating mechanism is a second time energized to operate said signal device, said last two mentioned means being adapted to break communication between said transmitter and receiver, and to return said signal device to inoperative condition when said actuating mechanism is energized a third time.

The structure defined in claim 1, and a sounder situated adjacent said transmitter, and means for operating said sounder when said actuating mechanism is energised to sound a signal for transmission from said transmitter into said receiver.

3. The structure defined in claim 1, and a sounder situated adjacent said transmitter, and means for operating said sounder when said actuating mechanism is energized to cause a difierent signal from said sounder to be transmitted by said transmitter to said receiver when said actuating mechanisn'i is energized a first, a second and a third time.

4. A communicating device for use between a first point and a second point, having in combination, an electric transmission line running between said two points, an electrically operating actuating mechanism at the second point tending to remain and return to one position but adapted when energized to move to a second position, means at the first pointfor passing electric current through said line to cause said actuating mechanism to be energized, a sound transmitter at said second point mounted to be affected by noises at said second point, a sound receiver at said first point, a signal device at said second point, means adapted to be operated when said actuating mechanism is first energized to put said sound transmitter into electrical communication through said line with said sound receiver, and means adapted to be operated when said actuating mechanism is a second time energized to operate said signal.

device, said last two mentioned means being adapted to break communication between said transmitter and receiver, and to return said signal device to inoperative condition when said actuating mechanism is energized a third time.

5. In a railway system, a device aiiording comn'iunication between a train dispatchers otfice and trains passing a non-attended wayside station. having in combination, an electric transn'iission line between said office and Said station, an electrically operating actuating mechanism in said station, tending to remain and return to one position but adapted when energized to move to a second position, means in said ofiice for passing an electric current through said line to cause said actuating mechanism to be energized, a sound transmitter at said station mounted to be affected when energized by the noise of trains passing said station, a sound receiver in said ofiicc,

means adapted to be operated when said actuating mechanism is first energized to put said sound transmitter into electrical communication through said line with said receiver, a signal device at said station mounted to signal trains passing said station, means adapted to operate said signal as said actuating mechanism is a second time energized, said last two mentioned means being adapted to return said signal device to non-signaling position and to disconnect said transmitter from said line when said actuating mechanism is a third time energized.

6. A communicating device for use between a first point and a number of second points, having in combination, an electrical transmis sion line running between said first point and all of said second points, an electrically operating actuating mechanismat each second point tending to remain and return (to one position but adapted when energized to move to a second position, means at each of said second points receptive only to a certain peculiar electrical signal passing through said line to cause the electrically operating actuating mechanism at the particular second point to be energized, means at the first point for passing a number of different peculiar electrical signals through said line, to each signal of which one of said first mentioned means is receptive, a sound transmitter at each of said second points mounted to be affected when energized by noises at the particular second point where mounted, a sound receiver at said first point adapted to receive through said line from said transmitter, a signal device at each of said second points, means at each of said second points adapted tobe operated when the actuating mechanism there situated is first energized to throw the sound transmitter there situated. into electrical communication through said line with said sound receiver, and means at each of said second points adapted to be voperated when the actuating mechanism there situated is a second time energized to operate the signal device there situated, the last two mentioned means at each point being adapted to break connection between the transmitter there situated and said line and to also return the signal device there situated to inoperative condition when the actuating mechanism there situated is'a third time energized;

7. A communicating device for use between a first point and a second point, having in combination, an electric transmission line running between said two points, an electrically operating actuating mechanism at the second point tending to remain and return to one position but adapted when energized to move to a second position, means at the first point for passing electric current through said line to temporarily and continuously cause said actuating mechanism to be energized, a sound transmitter at said second actuatingmechanism is a second time ener gized to operate a desired one of said signal devlces, the particular one of said signal devices operated depending on whether said' actuating mechanism is temporarily or continuously energized the second time, said last two mentioned means being adapted to break communication between said transmitter and receiver and to return the signal device operated to inoperative condition when said actuating mechanism is energized a third time.

8. The structure defined in claim 7, and a sounder disposed adjacent said sound transmitter, and means for operating said sounder to sound a difierent signal when said actuating mechanism is energized a first, a second and a third time, and to sound adistinguishing signal when, during the second energization of said actuating mechanism, said actuating mechanism is energized temporarily or continuously.

9. Ina railway system, a device affording communication between a train dispatchers ofiice and trains passing an unattended wayside station, having in combination, an electric transmission line running between said otfice and said station, an elect ically operating actuating mechanism in said station, tending to remain and return to one position but adapted when energized to move to a second position, means at said or'fice for passing an electric current through said line to cause said actuating mechanism to be either temporarily or continuously energized, a sound transmitter at said station mounted to be affected when energized by the noise of trains passing said station, a sound receiver in said ofiice, a first signal device at said station adapted to be operated to signal trains passing said station in one direction, a second signal device at said station adapted to be operated to signal trains passing said station in an opposite direction, means oper ative when said actuating mechanism is first energized to put said sound transmitter into electrical communication through said line with said receiver, and means operative when said actuating mechanism is a second time energized to operate a desired one of said signal devices, the particular one of said signal devices operated depending on whether said actuating mechanism is temporarily or continuously energized a second time, said last two mentioned means being adapted to break communication between said transmitter and receiver and to return the signal device operated. to inoperative condition when saidactuating mechanism is energized a third time.

10. A device affording communication in a railway system between a train dispatchers office and trains passing an unattended wayside station, having in combination, an electric transmission line between said office and said station, a relay at said stat-ion, means at said station adapted to be operated to cause said relay to be energized, means at said office for transmitting an electric current through said line to operate said first mentioned means, a sound transmitter at said station mounted to be affected when energized by the noise of trains passing said station, a sound receiver in said office, means adapted to be operated when said relay is first energized to cause said transmitter to be electrically energized, and throw the same into electrical communication with said receiver through said line, a signal device at said station mounted to signal trains passing the station, means adapted to operate said signal as said relay is a second time energized, said last two mentioned means being adapted to break communication between said transmitter and receiver and to return said signal device to inoperative condition when said relay is energized 'athird time.

11. A device affording communication in a railway system between a train dispatchers office and trains passing unattended wayside stat-ions, having in combination, an electric transmission line running between said office and all of said stations, a relay in each station, a selective mechanism in each station in electrical communication with said line and adapted when a certain signal passes over said line to cause the relay in the same station to be energized, a selector mechanism in said dispatchers oiiice in electrical-communication with said line and adapted to transmit electrical signals through said line to afiect a desired one of said selective mechanisms, a sound transmitter in each of said stations so situated as to be affected when energized by the noise of the trains passing a particular station, a sound receiver in said ofiice adapted to receive through said line from said transmitters when said transmitters are energized, and means at each station adapted to electrically energize the sound transmitter thereat, and to throw the same into electrical communication through said line with said receiver when said relay is energized.

12. A device affording communication in a railway system between a train dispatchers of'rice and trains passing unattended wayside stations, having in combination, an electric transmission line running between said office and all of said stations, a relay in each station, a selective mechanism in each station in electrical communication with said line and adapted when a certain signal passes over said line to cause the relay in the same station to be energized, a selector mechanism in said dispatchers office in electrical communication with said line and adapted to transmit electrical signals through said line to affect a desired one of said selective mechanisms, a sound transmitter in each of said stations so situated as to be affected when energized by the noise of the trains passing a particular station, a sound receiver in said office adapted to receive through said line from said transn mitters when said transmitters are energized, a signal device at each station mounted to signal trains passing the station, means at each station adapted to electrically energize the sound transmitter thereat, and to throw the same into communication through said line with said sound receiver when the relay at the particular station is first energized, and means adapted to operate the signal at a certain station, when the relay thereat is a second time energized, the last two mentioned means at each station being adapted to deenergize the sound transmitter at the station and to throw the same out of electrical communication with said line and to return the signal device of the particular station to nonsignaling condition when the relay at the particular station is a third time energized.

13. A device affording communication in a railway system, between a train dispatchers ofiice and trains passing an unattended wayside station, having in combination, an electrical transmission line between said OifiCG and said station, a relay at said station, means controllable from the dispatchers ofiice for causing said relay to be temporarily or continuously energized, a sound transmitter at said station in such position as to be affected when energized by the noise of passing trains, a sound receiver in electrical communication with said line at the dispatchers office, a first signal device at said station situated to signal trains passing said station in one direction, a second signal device at said station situated to signal trains passing said station in an opposite direction, means adapted to be operated when said relay is first energized to energize said transmitter and to put the same into communication through said line with said receiver, means adapted to be operated when said relay is next energized to operate a desired one of said signal devices, the particular one of said signal devices operated d pending on whether said relay is temporarily or continuously energized, said last two mentioned means being adapted to be operated when said relay is a third time energized to de-energize said transmitter, break communication between said transmitter and said line and to return the signal device operated to non-signaling condition.

14. A device affording communication in a railway system between a dispatchers office and an unattended wayside station, having in combination, an electrical transmission line running between said oilice and said station, a sound transmitter at said wayside station mounted in such position as to be affected when energized by the noise of passing trains, a sound receiver at said oifice, a signal device at said station for signaling trains passing the station, a relay at said station, means operative from said ofiice to pass an electrical current through said line to cause said relay to be energized, a source of electrical energy at said station, a telephone circuit normally open but adapted when closed to place said transmitter in communication from said source through said line to said receiver, a signal circuit from said source normally open but adapted to be closed to operate said signal, means operating when said relay is first energizedto close saidtelephone circuit, means operating when said relay is a second time energized to close said signal circuit, said last two mentioned means being adapted to be operated when said relay is a third time energized to break said telephone circuit and said signal circuit.

15. The structure defined in claim 14, a sounder situated adjacent said transmitter and means for operating said sounder each time said relay is energized.

16. A device alfording communication in -a railway system between a dispatchers oflice and trains passing an unattended wayside station having in combination, an electrical transmission line running between said office and said station, a sound transmitter mounted at said station in such position as to be afifected when energized by the noise of passing trains, a sound receiver at said oilice in electrical communication with said line, a signal device at said station mounted to signal trains passing the station, a relay at said station, means operative from said office for causing said relay to be energized, a source of electricity at said Wayside station, a normally open transmitter circuit from said source of electricity through said transmitter to said line, a normally open signal circuit from said source of electricity to said signal device, means operative when said relay is first energized to close said transmitter circuit, means operative when said relay is a second time energized to close said signal circuit, said last two mentioned means being operative when said relay is energized a third time to open said transmitter circuit and to open said signal circuit.

17. A device affording communication in a railway system between a dispatchers oifice and trains passing an unattended wayside station, having in'combination, an electrical transmission line running between said office and said station, a telephone transmitter at said wayside station mounted to be afiected when energized by the noise of passing trains, a telephone receiver at said office, a signal device adapted to signal trains passing said station, a source of electricity at said station, a normally open telephone circuit running from said source through said transmitter tosaid line and from said line to said receiver, a normally open signal circuit leading from said source to said signal device, an electric motor at said station, a sliding drum, a conductor ring mounted on said drum, an insulated block in' said ring, a pair of spring contacts, one of which is normally in engagement with said ring and the other of which is normally in engagement with said insulated block, a motor circuit leading from said source of electricity through said contacts and ring to said motor, means for rotating said. drum when said motor is operated, means for shifting said drum to move said insulated block out of engagement with one of said contacts, to close said motor circuit, means for closing said telephone circuit when said drum first rotates and means for closing said signal circuit when said drum rotates a second time.

p 18. A device afiording communication in a railway system between a dispatchers oflice and trains passing an unattended wayside station, having in combination, an electrical transmission line running between said oflice and, said station, a telephone transmitter at said station mounted to be affected whenenergized by the noise of passing trains, a telephone receiver at said oflice, a signal device adaptedto signal trains passing said station, asource of electricity at said station, a normally open telephone circuit running from said source through said transmitter to said line and from said line to said receiver, a normally open signal circuit running from said source to said signal device, an electric motor at said station, a sliding drum, a conductor ring mounted on said drum, an insulated block on said ring, a pair of spring contacts, one of which is normally in engagement with said ring and the other of which is normally in engagement with said insulated block, a motor circuit leading from said source through said contacts and ringto said motor, means for rotating said drum when said motor is operated, means for shifting said drum to move said insulated block out of engagement with one of said contacts, to close said motor circuit, means for closing said telephone circuit when said drum first rotates, means. for closing said signal circuit when said drum rotates a second time, a sounder situated adjacent said telephone transmitter, and means for making and breaking a circuit to said sounder as said drum is rotated.

19. A device affording communication in a railway system between a dispatchers ofiice and trains passing an unattended wayside station, having in combination, an electrical transmission line running between said oflice 5 and said station, a telephone transmitter at said station mounted to be affected when energized by the noise of passing trains, a telephone receiver at said oflice, a first signal device adapted to signal trains passing said station in one direction, a second signal device adapted to signal trains passing said station in an opposite direction, a source of electricity at said station, a normally open tele- 1 phone circuit running from said source through said transmitter to said line and from each line to said receiver, a normally open signal circuit leading from said source to said signal devices, a switch in said signal circuit adapted to be operated to break or make a portion of the signal circuit leading to one of said signal devices andto make or break a portion of said signal circuit to the other of said signal devices, an electric motor at said station, a sliding drum, a conductor ring mounted on saiddrum, an'insulated block on said ring, a pair of spring contacts, one of which is normally in engagement with said ring and the other of which is normally in engagement with said insulated block, when 39 said drum stands in one position of rotation and is held in one slid position, the other 01": said spring contacts being adapted to engage with said insulated block when said drum is turned to another rotated position and is held in a second slid position, a motor circuit leading from said source of electricity through said contacts and ring to said motor, means for rotating said drum when said moa tor is operated, means for shifting said drum to move said insulated block out of engagement with one of said contacts to close said motor circuit, means for closing said telephone circuit when said drum first rotates, means for closing said signal circuit when said drum rotates a second time, and means for closing said switch in said signal circuit to operate a desired one of said signal devices when said drum rotates a second time,

. the particular one of said signal devices operated depending on whether said drum is held in one slid position or another slid position, as it is rotated.

20. The structure defined in claim 19, a

sounder disposed adjacent said telephone transmitter, a sounder circuit leading from a source of electricity to said sounder, a pair of spring contacts in said sounder circuit and a plurality of pins adapted to be rotated to in- .l termittently engage said last mentioned ring contacts to make and break said sounder circuit as said drum is rotated.

In testimony whereof I aifix my signature.

RAY G. STILLMAN. 

